Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/11—Encapsulated compositions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/046—Aerosols; Foams
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/31—Hydrocarbons
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
  • A61K8/345—Alcohols containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/60—Sugars; Derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
  • A61K8/732—Starch; Amylose; Amylopectin; Derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
  • A61K8/738—Cyclodextrins
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q13/00—Formulations or additives for perfume preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q15/00—Anti-perspirants or body deodorants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/02—Preparations for cleaning the hair
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D83/00—Containers or packages with special means for dispensing contents
  • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
  • B65D83/75—Aerosol containers not provided for in groups B65D83/16 - B65D83/74
  • B65D83/752—Aerosol containers not provided for in groups B65D83/16 - B65D83/74 characterised by the use of specific products or propellants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/30—Characterized by the absence of a particular group of ingredients
  • A61K2800/31—Anhydrous
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/41—Particular ingredients further characterized by their size
  • A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/60—Particulates further characterized by their structure or composition
  • A61K2800/61—Surface treated
  • A61K2800/62—Coated
  • A61K2800/624—Coated by macromolecular compounds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
  • A61K2800/87—Application Devices; Containers; Packaging

Definitions

• the present invention relates to an anhydrous composition
• an anhydrous composition comprising:
• At least particles comprising a core containing at least one beneficial agent and an envelope surrounding the core; said envelope comprising at least one hydrophobically modified polysaccharide and at least one water-soluble carbohydrate and/or water-soluble polyol; said particles simultaneously having a poured powder density ranging from 300.0 g/l to 600.0 g/l and an absolute density of greater than 1.0 and 2) at least one propellant.
• the invention also relates to a cosmetic process for caring for and/or for the hygiene of and/or for conditioning and/or for fragrancing and/or for making up a keratin material, which consists in applying to said keratin material a composition as defined previously.
• the invention additionally relates to a cosmetic process for treating body odor and optionally human perspiration, which consists in applying to a keratin material a composition as defined previously comprising at least one deodorant active agent and/or antiperspirant active agent in free form (not encapsulated) and/or in encapsulated form.
• Many presentation forms allow the dispensing of beneficial agents, especially of cosmetic or pharmaceutical products, fragrancing products, veterinary products; animal hygiene and/or care products; household maintenance products such as laundry care and/or cleaning products (stain removers, fabric softeners, ironing products), cleaning and/or maintenance products for domestic electrical appliances, cleaning and/or maintenance products for floors, tiles, wood, etc.; sanitary products such as deodorizers, descaling products, unblocking agents for pipes; textile maintenance products, maintenance products for leather goods such as shoes and soles; products derived from the agrifood industry; agricultural products; plant-protection products; paints; inks; maintenance products in the motor vehicle industry.
• household maintenance products such as laundry care and/or cleaning products (stain removers, fabric softeners, ironing products), cleaning and/or maintenance products for domestic electrical appliances, cleaning and/or maintenance products for floors, tiles, wood, etc.
• sanitary products such as deodorizers, descaling products, unblocking agents for pipes
• textile maintenance products maintenance products for leather goods
• aerosols are widely used. Mention will especially be made of household maintenance products, sanitation products, deodorizers, air fresheners and cosmetic products such as deodorants, dry shampoos, hairstyling products or else massage or haircare oils.
• One of the means for achieving such an aim is to encapsulate them.
• the object of this encapsulation is to reduce the evaporation and the transfer of the active material toward the environment, either during storage or during the production of the products, or alternatively during their use. Said encapsulation may also make the material easier to use by diluting it and by promoting its uniform distribution in the support.
• Microencapsulation especially includes all the technologies for coating or trapping active principles in solid, liquid or gaseous form inside individualized particles whose size ranges between a few microns and a few millimeters. If these microparticles are hollow (vesicular), they are referred to as microcapsules, and if they are filled (matrix-based), they are referred to as microspheres. Their size ranges from 1 ⁇ m to more than 1000 ⁇ m. These microparticles may or may not be biodegradable and may contain between 5% and 90% (by mass) of active substance.
• the encapsulated active substances are of very varied origin: pharmaceutical or cosmetic active principles, food additives, plant protection products, fragranced essences, microorganisms, cells, or alternatively chemical reaction catalysts.
• encapsulation microparticles lies in the presence of a polymer membrane, which isolates and protects the contents from the external medium.
• the membrane will be destroyed during use to release its contents (for example: “scratch and sniff” advertising inserts which release perfume when the microcapsules are crushed), or alternatively the membrane will remain present throughout the release of the contents, the rate of diffusion of which it will control (for example: encapsulation of medicaments for sustained release).
• the materials constituting the particle are generally hydrophobic or hydrophilic polymers of natural or synthetic origin or alternatively lipids.
• the main processes for performing the encapsulation of substances in microparticles are interfacial polymerization, interfacial crosslinking, emulsification followed by evaporation or extraction of the solvent, double emulsification evaporation/extraction of solvent, spray-drying, prilling or coacervation.
• the aim of the present invention is to find novel anhydrous aerosol compositions comprising an encapsulated system, for:
• the particles obtained via this process were highly odorous in dry form on account of the presence of free (non-encapsulated) perfume, that they were formed mainly from agglomerates that were liable to form a sediment in an aerosol device and prevent correct delivery of the product, and that they did not have the density characteristics suitable for the objective of the invention.
• U.S. Pat. No. 6,200,949 also describes a process for forming a particulate material containing a hydrophilic perfume, comprising the successive steps consisting in forming an aqueous emulsion of perfume containing 40% to 60% by weight of water, 3% to 30% by weight of maltodextrin and 10% to 40% by weight of hydrophobically modified starch, and then in drying it by spraying in an atomizer (air stream of 420 m 3 /h heated to 204° C.) so that the particles are formed with a mean size of from about 3 to about 10 microns and a perfume content of from 15% to 50% by weight.
• an atomizer air stream of 420 m 3 /h heated to 204° C.
• the particles obtained via this process are highly odorous in dry form on account of the presence of free (non-encapsulated) perfume and are formed mainly from agglomerates which are liable to form a sediment in an aerosol device and prevent correct delivery of the product and do not have the density characteristics suitable for the objective of the invention.
• the encapsulated beneficial agent is a fragrancing ingredient and/or a whole perfume, it is all the more important for the encapsulation to be total, which leads to odorless particles in anhydrous formulations allowing the formulator to combine them, if desired, with any free perfume of his choice (identical or different) without any risk of interactions or of disruption of the chosen fragranced note.
• Patent EP 1 917 098 B1 proposes a process for preparing encapsulation particles by precipitation, said process using:
• anhydrous aerosol composition containing at least particles comprising a core containing at least one beneficial agent and an envelope surrounding the core; said envelope comprising at least one hydrophobically modified polysaccharide and at least one water-soluble carbohydrate and/or water-soluble polyol; said particles simultaneously having a poured powder density ranging from 300.0 g/l to 600.0 g/l and an absolute density of greater than 1.0.
• the particles according to the present invention make it possible, within the anhydrous aerosol compositions, to encapsulate ingredients that are particularly fragile and volatile while conserving the exact composition developed by the formulator. They are leaktight in the absence of stimuli and especially remain odorless for the odorous encapsulated ingredients such as fragrancing ingredients. Said particles are stable in the anhydrous aerosol compositions and can release all or part of their content virtually instantaneously on contact with water and most particularly with atmospheric moisture or perspiration. By virtue of their low poured powder density (loose bulk density), they do not sediment or sediment only very little. They are compatible with propellant gases and are resistant to compression so as to be able to be formulated in an aerosol device without being damaged.
• the present invention relates to an anhydrous composition
• an anhydrous composition comprising:
• At least particles comprising a core containing at least one beneficial agent and an envelope surrounding the core; said envelope comprising at least one hydrophobically modified polysaccharide and at least one water-soluble carbohydrate and/or water-soluble polyol; said particles simultaneously having a poured powder density ranging from 300.0 g/l to 600.0 g/l and an absolute density of greater than 1.0 and 2) at least one propellant.
• the composition comprises a physiologically acceptable medium.
• compositions of the invention are cosmetic or dermatological.
• compositions according to the invention may be used in other industrial applications and may especially be consumer products chosen from veterinary products; animal hygiene and/or care products; household maintenance products such as laundry care and/or cleaning products (stain removers, fabric softeners, ironing products), cleaning and/or maintenance products for domestic electrical appliances, cleaning and/or maintenance products for floors, tiles, wood, etc.; sanitary products such as deodorizers, descaling products, unblocking agents for pipes; textile maintenance products, maintenance products for leather goods such as shoes and soles; products derived from the agrifood industry; agricultural products; plant-protection products; paints; inks; maintenance products in the motor vehicle industry.
• household maintenance products such as laundry care and/or cleaning products (stain removers, fabric softeners, ironing products), cleaning and/or maintenance products for domestic electrical appliances, cleaning and/or maintenance products for floors, tiles, wood, etc.
• sanitary products such as deodorizers, descaling products, unblocking agents for pipes
• textile maintenance products maintenance products for leather goods such as shoes
• the invention also relates to a cosmetic process for caring for and/or for the hygiene of and/or for fragrancing and/or for making up a keratin material, which consists in applying to said keratin material a composition as defined previously.
• the invention also relates to a cosmetic process for treating body odor and optionally human perspiration, which consists in applying to a keratin material a composition as defined previously comprising at least one deodorant active agent and/or antiperspirant active agent in free form and/or in encapsulated form.
• the invention also relates to an aerosol device formed from a container comprising an aerosol composition as defined previously and from a means for dispensing said composition.
• the invention also relates to a consumer product, characterized in that it is conditioned in an aerosol device formed from a container comprising a composition as defined previously and from a means for dispensing said composition.
• anhydrous composition means a composition with a water content of less than 5% by weight, preferably less than 2% by weight and even more preferably less than 1% by weight relative to the weight of said composition, or alternatively even less than 0.5% and especially free of water.
• the water mentioned includes the residual water provided by the mixed ingredients.
• physiologically acceptable medium is intended to denote a medium that is suitable for the topical administration of a composition.
• a physiologically acceptable medium is generally a medium which has no unpleasant odor and/or appearance, and which is perfectly compatible with topical administration.
• keratin material means the skin, the scalp, the lips and/or integuments such as the nails and keratin fibers, for instance bodily hair, the eyelashes, the eyebrows and head hair.
• the term “cosmetic composition” means any composition applied to a keratin material to produce a non-therapeutic hygiene, care, conditioning or makeup effect contributing toward improving the well-being and/or enhancing the beauty and/or modifying the appearance of the keratin material onto which said composition is applied.
• the term “dermatological composition” means any composition applied to a keratin material to prevent and/or treat a disorder or dysfunction of said keratin material.
• the term “cosmetic treatment” means any non-therapeutic fragrancing, hygiene, care, conditioning or makeup effect contributing toward improving the well-being and/or enhancing the beauty and/or modifying the appearance or odor of the keratin material onto which said composition is applied.
• consumer product means any manufactured product intended to be used or consumed in the form in which it is sold and which is not intended for a subsequent manufacture or modification.
• the consumer products according to the invention may be cosmetic products also including cosmetic formulations for caring for and/or for the hygiene of and/or for making up the skin, the lips, the nails, the eyelashes, the eyebrows, the hair or the scalp; oral hygiene products such as breath fresheners; dermatological products; fragrancing products; pharmaceutical products; products for veterinary use, especially animal hygiene and/or care products; household maintenance products such as laundry care and/or cleaning products (stain removers, fabric softeners, ironing products); products for cleaning and/or maintaining domestic electrical appliances; products for cleaning and/or maintaining floors, tiles, wood, etc.; sanitary products such as deodorizers, descaling products, unblocking agents for pipes; textile maintenance products; maintenance products in leather goods such as shoes and soles; products derived from the agrifood industry; agricultural products; plant-protection products; paints;
• the term “beneficial agent” means any compound present in a consumer product which produces a beneficial effect perceived by the consumer during its use and/or obtained on the consumer product itself, said beneficial effect possibly being a sensory improvement or a modification, which is especially visual and/or olfactory and/or tactile, an improvement in the comfort and/or ease of application, an esthetic effect, a hygiene effect, a sensation of cleanliness, or a curative and/or prophylactic effect.
• particles comprising a core containing at least one beneficial agent means a particle comprising at least one beneficial agent which is immobilized, captured and/or encapsulated in the matrix of an encapsulation or trapping system; said beneficial agent being released to the exterior gradually as the encapsulation or trapping system deteriorates when its degradation takes place on contact with a medium with which it reacts or under the effect of a stimulus such as a supply of water.
• the determination is performed at room temperature (20-25° C.) and under normal atmospheric conditions (1 atmosphere) using a 100 ml measuring cylinder.
• the measuring cylinder is weighed empty and then filled with a volume of 100 ml of poured powder, without tapping.
• the difference in mass between the empty measuring cylinder and the cylinder filled with 100 ml of powder gives the poured powder density.
• the measurement consists in determining the weight of a sample of the solid powder by simple weighing, followed by measuring the volume occupied by the powder particles by measuring the volume of liquid displaced by the powder sample by immersion in this liquid.
• the liquid chosen must be sparingly volatile and must not be a solvent for the powder. Cyclohexane is generally chosen. The measurements are performed at least twice.
• the flask is filled to about one third of its volume with the powder to be analyzed.
• the flask is filled to slightly below the graduation mark with cyclohexane. In order to completely remove the air trapped in the powder, the following are performed:
• m 5 is the weight of the flask thus filled.
• the weight of powder analyzed is equal to m 4 ⁇ m 1 (for good accuracy, this weight must be greater than 2 g). Since the density of air is very low relative to that of the solid, it is taken that m 4 ⁇ m 1 is equal to the weight of the constituent solid of the powder.
• the weight of cyclohexane corresponding to the volume occupied by the solid (Vs) is equal to:
• Vs where ⁇ cyclo is the density of cyclohexane at the temperature of the laboratory.
• Vf is the graduated volume of the flask and ⁇ water is the density of water at the temperature of the laboratory, then:
• ⁇ cyclo ⁇ water ( m 2 ⁇ m 1 )/( m 3 ⁇ m 1 )
• the absolute density of the constituent solid of the powder is equal to:
• ⁇ s [ ⁇ water ( m 4 ⁇ m 1 )( m 2 ⁇ m 1 )]/[ m 6 ( m 3 ⁇ m 1 )].
• the particles in accordance with the invention comprise a core containing at least one beneficial agent and an envelope surrounding the core; said envelope comprising at least one hydrophobically modified polysaccharide and at least one water-soluble carbohydrate and/or a water-soluble polyol; said particles simultaneously having a poured powder density ranging from 300.0 g/l to 600.0 g/l and an absolute density of greater than 1.0.
• the particles in accordance with the present invention are preferably spherical.
• spherical means that the particle has a sphericity index, i.e. the ratio between its largest diameter and its smallest diameter, of less than 1.2. In this case, such particles are generally referred to as “capsules”.
• mean size of the particles means the parameters D[4,3] and D[2,3] measured via the dry route by laser scattering using a Microtrac S3500 particle size analyzer, the results being expressed in the form of the volume and number particle size distributions giving access to the mean diameter.
• the spherical particles in accordance with the present invention thus preferably have a number-mean diameter ranging from 1 to 30 ⁇ m, more preferentially ranging from 2 to 15 ⁇ m and even better still from 5 to 10 ⁇ m and a volume-mean diameter ranging from 5 to 150 ⁇ m, preferably ranging from 10 to 100 ⁇ m and even better still from 20 to 80 ⁇ m.
• the particles according to the invention containing the beneficial agent preferably represent from 0.1% to 60% by weight, preferably from 0.3% to 40% by weight and better still from 0.5% to 20% by weight relative to the total weight of the composition.
• hydrophobically modified polysaccharide means any chemically or enzymatically modified polysaccharide comprising at least one hydrophobic functional group.
• Polysaccharides are carbohydrate macromolecules formed by the linking of a large number of hydrophilic elementary sugars (saccharides) bonded together via O-oside bonds.
• the hydrophobic functional groups of the present invention are hydrocarbon-based groups (formed essentially from carbon and hydrogen atoms) comprising at least 4 carbon atoms, preferably at least 6 and better still at least 8 carbon atoms, such as alkyl, alkenyl, aryl (i.e. phenyl) or aralkyl (i.e. benzyl) groups.
• the maximum number of carbon atoms in the hydrocarbon-based group is preferably 24, more preferentially 20 and even more preferentially 18.
• the hydrophobic hydrocarbon-based groups may be unsubstituted, for example formed from a simple long alkyl chain, or may be substituted with unreactive groups, for instance aromatic groups such as aryl (i.e. phenyl) or aralkyl (i.e. benzyl) groups or alternatively polar groups, for instance carboxyls or hydroxyls.
• halogenated derivatives epoxides, isocyanates, or carboxylic acids or derivatives thereof (esters, acid halides or anhydrides).
• hydrophobically modified polysaccharides preference is given to hydrophobically modified neutral polysaccharides such as:
• the hydrophobically modified polysaccharide preferably represents from 20% to 90% by weight, especially from 30% to 80% by weight, better still from 40% to 70% by weight and even better still from 40% to 60% by weight relative to the total weight of the envelope of the particle.
• hydrophobically modified starches will be chosen from among the hydrophobically modified polysaccharides.
• the botanical origin of the starch molecules may be cereals or tubers.
• the starches are chosen, for example, from corn starch, rice starch, cassava starch, tapioca starch, barley starch, potato starch, wheat starch, sorghum starch and pea starch.
• hydrophobically modified starch means any chemically or enzymatically modified starch comprising at least one hydrophobic functional group.
• hydrophobically modified starches in accordance with the invention are preferably chosen from
• water-soluble carbohydrate or “water-soluble polyol” refers to a carbohydrate or a polyol which, when introduced into water without pH modification at 25° C., at a mass concentration equal to 3%, makes it possible to obtain a macroscopically homogeneous and transparent solution, i.e. a solution with a minimum light transmittance value, at a wavelength equal to 500 nm, through a sample 1 cm thick, of at least 80% and preferably of at least 90%.
• a macroscopically homogeneous and transparent solution i.e. a solution with a minimum light transmittance value, at a wavelength equal to 500 nm, through a sample 1 cm thick, of at least 80% and preferably of at least 90%.
• carbohydrates also known as saccharides
• saccharides means all simple sugars or oses and combinations thereof or osides.
• Carbohydrates usually comprise:
• monosaccharides or oses which are of two types: aldoses comprising an aldehyde function on the first carbon and ketoses comprising a ketone function on the second carbon. They are also distinguished according to the number of carbon atoms they contain.
• oligosaccharides or oligosides
• saccharide oligomers bearing a sequence of 2 to 10 monosaccharide units linked via glycoside bonds.
• polyholosides or polysaccharides or polyosides
• saccharides or monosaccharides that may be used according to the invention, mention may be made, alone or as mixtures, of:
• oligosaccharides that may be used according to the invention, mention may be made of:
• disaccharides mention may be made of: cellobiose, isomaltose, isomaltulose, lactose, lactulose, maltose, sucrose, trehalose or melibiose.
• triholosides composed of three saccharide molecules, for instance: raffinose or maltotriose.
• dextrins which are mixtures of linear glucose oligosides in which the glucose units are linked via oside bonds of the ⁇ -(1,4) or ⁇ -(1,6) type.
• glucose syrups obtained by acidic or enzymatic hydrolysis of starch, the D.E. of which is between 20 and 100.
• D.E. or “dextrose equivalent” is the indicator of the degree of hydrolysis of starch. The higher the D.E., the more extensive the hydrolysis, and thus the higher the proportion of simple (short-chain) sugars.
• glucose-fructose syrups especially with a high content of fructose HFCS: high-fructose corn syrup
• HFCS high-fructose corn syrup
• glucose-fructose syrups also known as isoglucose syrups, which may be used according to the invention, mention may be made of:
• oligosaccharides use will be made more preferentially of cellobiose, maltose, isomaltose, raffinose and glucose syrups, more particularly glucose syrups.
• a glucose syrup with a D.E. ranging from 21 to 60 and even more preferentially a glucose syrup with a D.E. of from 21 to 38, for instance the dehydrated glucose syrups sold by Tereos under the names G210, G290 and G380.
• Dextrose equivalent or D.E., dextrose or D-glucose being the result of a total hydrolysis of starch.
• D.E. dextrose or D-glucose being the result of a total hydrolysis of starch.
• the maltodextrins used in accordance with the invention preferentially have a D.E. ranging from 4 to 20 and better still maltodextrins with a D.E. ranging from 12 to 20.
• Use will preferably be made of potato or corn maltodextrins such as those sold under the trade names MD 20P® from Avebe and Maldex 120®, Maldex 170® and Maldex 190® from Tereos.
• polyols are linear, branched and/or cyclic, non-glycoside, saturated or unsaturated carbon-based and especially hydrocarbon-based compounds, comprising 4 to 18 carbon atoms, especially 4 to 16, or even 4 to 12 carbon atoms, and 3 to 9 hydroxyl (OH) groups, and also possibly comprising one or more oxygen atoms intercalated in the chain (ether function).
• the polyols in accordance with the invention are preferably linear or branched saturated hydrocarbon-based compounds, comprising 4 to 18 carbon atoms, especially 4 to 16 or even 4 to 12 carbon atoms, and 3 to 9 hydroxyl (OH) groups.
• the polyol is chosen from sorbitol, maltitol, mannitol and isomalt, and mixtures thereof.
• water-soluble carbohydrates and water-soluble polyols in accordance with the invention are water-soluble oligo- and polysaccharides and more preferentially dextrans, pullulans , glucose syrups and maltodextrins and better still glucose syrups with a D.E. ranging from 21 to 38 and/or maltodextrins with a D.E. ranging from 4 to 20 and better still maltodextrins with a D.E. ranging from 12 to 20.
• glucose syrups such as those sold by Tereos under the names G210, G290 and G380 and potato or corn maltodextrins such as those sold under the trade names MD 20P® from Avebe and Maldex 120®, Maldex 170® and Maldex 190® from Tereos.
• the water-soluble carbohydrate(s) and/or polyol(s) in accordance with the invention represent from 10% to 80% by weight, preferably from 15% to 70% by weight, more preferentially from 20% to 65% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle.
• the envelope of the particles according to the invention is formed from
• the envelope of the particles according to the invention is formed from at least one starch (C 5 -C 20 )alkenyl succinate and from at least one maltodextrin with a D.E. ranging from 4 to 20 and preferably ranging from 12 to 20.
• the envelope of the particles according to the invention is formed from at least one starch (C 5 -C 20 )alkenyl succinate and from at least one glucose syrup with a D.E. ranging from 21 to 60 and preferentially ranging from 21 to 38.
• the envelope of the encapsulation particles is formed from
• At least one starch (C 5 -C 20 )alkenyl succinate in an amount ranging from 20% to 90% by weight, especially from 30% to 80% by weight, preferably from 40% to 70% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle and b) at least one glucose syrup with a D.E. ranging from 21 to 38 and/or a maltodextrin with a D.E. ranging from 4 to 20 in an amount ranging from 10% to 80% by weight, preferably from 15% to 70% by weight, more preferentially from 20% to 65% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle.
• the envelope of the encapsulation particles is formed from:
• At least one starch (C 5 -C 20 )alkenyl succinate in an amount ranging from 20% to 90% by weight, especially from 30% to 80% by weight, preferably from 40% to 70% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle and b) at least one maltodextrin with a D.E. ranging from 4 to 20 in an amount ranging from 10% to 80% by weight, preferably from 15% to 70% by weight, more preferentially from 20% to 65% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle.
• the envelope of the encapsulation particles is formed from:
• At least one starch (C 5 -C 20 )alkenyl succinate in an amount ranging from 20% to 90% by weight, especially from 30% to 80% by weight, preferably from 40% to 70% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle
• at least one glucose syrup with a D.E. ranging from 21 to 38 in an amount ranging from 10% to 80% by weight, preferably from 15% to 70% by weight, more preferentially from 20% to 65% by weight and better still from 40% to 60% by weight relative to the total weight of the envelope of the particle.
• the particles according to the invention may especially be prepared according to the process described in patent EP 1 917 098 B1 from FeyeCon.
• the particles are obtained according to a process comprising at least the following steps:
• the composition comprises one or more propellants.
• the propellant used in the cosmetic composition according to the invention is chosen from dimethyl ether, volatile hydrocarbons such as propane, isopropane, n-butane, isobutane, n-pentane and isopentane, and mixtures thereof, optionally with at least one chlorinated and/or fluorinated hydrocarbon; among the latter, mention may be made of the compounds sold by the company DuPont de Nemours under the names Freon® and Dymeli®, and in particular monofluorotrichloromethane, difluorodichloromethane, tetrafluorodichloroethane and 1,1-difluoroethane sold especially under the trade name Dymel 152 A® by the company DuPont.
• volatile hydrocarbons such as propane, isopropane, n-butane, isobutane, n-pentane and isopentane, and mixtures thereof, optionally with at least one chlorinated and/or fluorinated hydrocarbon;
• Carbon dioxide, nitrous oxide, nitrogen or compressed air may also be used as propellant gas.
• the composition according to the invention comprises a propellant chosen from volatile hydrocarbons.
• the propellant is chosen from dimethyl ether, propane, isopropane, n-butane, isobutane, pentane and isopentane, and mixtures thereof.
• the weight ratio between the composition without propellant (fluid) and the propellant preferably varies in a ratio from 5/95 to 60/40, preferably from 10/90 to 50/50 and more preferentially from 15/85 to 30/70.
• Another subject of the present invention is an aerosol device formed from a container comprising a composition as defined previously and a means for dispensing said composition.
• the dispensing means which forms a part of the aerosol device, is generally formed from a dispensing valve controlled by a dispensing head, itself comprising a nozzle via which the aerosol composition is vaporized.
• the container containing the pressurized composition may be opaque or transparent. It may be made of glass, polymer or metal, optionally coated with a layer of protective varnish.
• the devices in accordance with the invention are well known to those skilled in the art and comprise aerosol containers comprising a propellant and also aerosol pumps using compressed air as propellant. These devices are described in patents U.S. Pat. No. 4,077,441 and U.S. Pat. No. 4,850,517.
• the amount of beneficial agent present in the particles in accordance with the invention preferably ranges from 0.1% to 80% by weight relative to the weight of the particle, preferably from 1% to 70% by weight, better still from 10% to 60% and even better still from 15% to 50% by weight relative to the total weight of the particle.
• the time for release of the beneficial agent will obviously vary according to the nature and intensity of the stimulus.
• the total duration for release of the beneficial agent may be modified and will depend greatly on the composition of the aerosol formula, the content of particles present in the aerosol, the nature and especially the chemical nature of the beneficial agent and its concentration in the particles (amount encapsulated in the particle) and the nature and intensity of the stimulus to which the particle containing the beneficial agent will be subjected.
• the release may equally be instantaneous or last several hours or even several days.
• Fatty substances are often used in the formulation of. They may be chosen from the group comprising
• fragmenting substance means any ingredient that is capable of giving off a pleasant odor.
• Perfumes are compositions especially containing starting materials (generally referred to as perfumery ingredients) described in S. Arctander, Perfume and Flavor Chemicals (Montclair, N.J., 1969), in S. Arctander, Perfume and Flavor Materials of Natural Origin (Elizabeth, N.J., 1960) and in Flavor and Fragrance Materials—1991, Allured Publishing Co., Wheaton, Ill.
• They may be synthesis products or natural products, for instance essential oils, absolutes, resinoids, resins, concretes, and/or synthetic products (terpene or sesquiterpene hydrocarbons, alcohols, phenols, aldehydes, ketones, ethers, acids, esters, nitriles or peroxides, which may be saturated or unsaturated, and aliphatic or cyclic).
• essential oils for instance essential oils, absolutes, resinoids, resins, concretes, and/or synthetic products (terpene or sesquiterpene hydrocarbons, alcohols, phenols, aldehydes, ketones, ethers, acids, esters, nitriles or peroxides, which may be saturated or unsaturated, and aliphatic or cyclic).
• an essential oil is an odoriferous product generally of complex composition, obtained from a botanically defined plant raw material, either by steam entrainment, or by dry distillation, or via an appropriate mechanical process without heating.
• the essential oil is generally separated from the aqueous phase via a physical process which does not result in any significant change in the composition.
• Abietaceae or Pinaceae conifers; Amaryllidaceae; Anacardiaceae; Anonaceae: ylang ylang; Apiaceae (for example Umbelliferae): dill, angelica , coriander, sea fennel, carrot, parsley; Araceae; Aristolochiaceae; Asteraceae: yarrow, artemisia , camomile, helichrysum; Betulaceae; Brassicaceae; Burseraceae: frankincense; Caryophyllaceae; Canellaceae; Cesalpiniaceae: copaifera (copaiba balsam); Chenopodaceae; Cistaceae: rock rose; Cyperaceae; Dipterocarpaceae; Ericaceae: gaultheria (wintergreen); Euphorbiaceae; Fabaceae; Geraniaceae: geranium; Guttiferae; Hamamelidace
• fragrancing substances are especially: geraniol, geranyl acetate, farnesol, borneol, bornyl acetate, linolool, linalyl acetate, linalyl propionate, linalyl butyrate, tetrahydrolinolool, citronellol, citronellyl acetate, citronellyl formate, citronellyl propionate, dihydromyrcenol, dihydromyrcenyl acetate, tetrahydromyrcenol, terpineol, terpinyl acetate, nopol, nopyl acetate, nerol, neryl acetate, 2-phenylethanol, 2-phenylethyl acetate, benzyl alcohol, benzyl acetate, benzyl salicylate, styrallyl acetate, benzyl benzoate, amyl sal
• perfumes are formed from a mixture of perfumery ingredients which may also be classified into head notes, heart notes and base notes.
• the three notes correspond to the greater or lesser volatility of the ingredients of which they are composed: highly volatile head note, moderately volatile heart note and sparingly volatile base note.
• the head note also known as the “top” note, is that which is first perceived by the sense of smell as soon as the perfume comes into contact with the keratin material or any substrate. However, it is the note which fades the fastest: it does not “last”. It is difficult to express the time of persistence of this note, since it is very variable: from a few minutes to about 10 minutes.
• citrus notes are essentially fresh and light. All the citrus notes especially fall into this category.
• perfumery they are grouped under the generic term hesperidean notes, which include orange, lemon, grapefruit, bergamot, neroli, etc. Mention will also be made of herbal notes such as lavender, laurel, thyme or rosemary, and aniseed, menthol, aldehyde, etc. notes. Mention will also be made of eucalyptus notes.
• the heart note also occasionally referred to as the “body note”, has a persistence which lasts from a few tens of minutes to a few hours, but its main characteristic is that it is not perceived until after a few minutes. Thus, it “starts” just before the head note dies off. It begins to express itself while the head note is gradually fading away. It is represented essentially by floral, fruity or spicy scents: lily of the valley, honeysuckle, violet, magnolia , cinnamon, geranium, jasmine, rose, iris, raspberry, peach, etc.
• the base note also occasionally known as the “bottom note”, gives a perfume its “durability”, persistence or staying power.
• perfume blotter or scent strip It is perceptible several hours, or even several days, or even several weeks after application onto clothing or a perfume blotter or scent strip, depending on the concentration of the perfume.
• perfume blotter or scent strip examples include woods, roots, mosses and resins and animal or mineral substances such as opoponax, musks, amber, sandalwood, benzoin, lichen, clove, sage, etc. Mention will also be made of vanilla, patchouli, coumarin, etc. notes.
• ingredients belonging to one or more notes may be encapsulated. However, it will be preferred to encapsulate the most volatile ingredients (i.e. the least persistent) belonging to the head and/or heart notes.
• volatile ingredients i.e. the least persistent belonging to the head and/or heart notes.
• examples that will be mentioned include:
• the encapsulation particles comprise at least one or more fragrancing substances with a saturating vapor pressure at 25° C. of greater than or equal to 10.0 Pa will preferably be chosen.
• the saturating vapor pressure (or vapor tension) is the pressure at which the gaseous phase of a substance is in equilibrium with its liquid or solid phase at a given temperature in a closed system. Calculation of the saturating vapor pressure may be performed using the following formula:
• the fragrancing substances with a saturating vapor pressure at 25° C. of greater than or equal to 10 Pa represent an amount ranging from 50% to 100% by weight, preferably from 60% to 100% by weight, more preferentially from 70% to 100% by weight and better still from 80% to 100% by weight relative to the total weight of the fragrancing substances present in the particles of the invention.
• pharmaceutical active principle means a molecule or a mixture of molecules which has a curative and/or prophylactic therapeutic effect, which can be administered by spraying.
• cosmetic active agent means any molecule which has a hygiene, care, makeup or coloring effect contributing toward the improvement well-being and/or enhancement or modification of the appearance of the human keratin material onto which said composition is applied.
• cosmetic active agents that may be applied to human keratin materials such as the skin, the lips, the scalp, the hair, the eyelashes or the nails, examples that may be mentioned, alone or as mixtures, include:
• the beneficial agent(s) present in the particles will be chosen from fragrancing substances.
• the fragrancing substances present in the particles are chosen from heart notes and/or head notes so as to be able both to compensate for their loss throughout the day and to afford an additional freshness effect throughout the day in response to perspiration or to atmospheric humidity or humidity provided, for example, by misters.
• the composition will contain particles containing at least one fragrancing substance and at least one fragrancing substance in free form, which may be identical to or different from the fragrancing substance present in said particles.
• Said fragrancing substances in free form may be chosen from those mentioned previously.
• the composition exclusively contains the fragrancing substance(s) in the encapsulation particles.
• all of the ingredients for fragrancing that are present in the composition are contained in the particles.
• composition according to the invention may advantageously comprise at least one fatty phase which may comprise at least one compound chosen from volatile or non-volatile, carbon-based, hydrocarbon-based, fluoro and/or silicone oils, waxes and/or solvents of mineral, animal, plant or synthetic origin, alone or as a mixture, provided that they form a stable homogeneous mixture and are compatible with the intended use.
• fatty phase which may comprise at least one compound chosen from volatile or non-volatile, carbon-based, hydrocarbon-based, fluoro and/or silicone oils, waxes and/or solvents of mineral, animal, plant or synthetic origin, alone or as a mixture, provided that they form a stable homogeneous mixture and are compatible with the intended use.
• volatile means any compound that is capable of evaporating on contact with the keratin substances in less than one hour, at room temperature (25° C.) and atmospheric pressure (1 atm).
• This volatile compound has especially a nonzero vapor pressure, at room temperature and atmospheric pressure, especially ranging from 0.13 Pa to 40 000 Pa (10 ⁇ 3 to 300 mmHg), in particular ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg) and more particularly ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg).
• nonvolatile means a compound that remains on the human keratin substances at room temperature and atmospheric pressure for at least one hour, and that especially has a vapor pressure of less than 10 ⁇ 3 mmHg (0.13 Pa).
• composition may also comprise other ingredients in free form (not encapsulated or imprisoned in the particles of the invention) used commonly in cosmetic compositions.
• ingredients may be chosen from antioxidants, preserving agents, cosmetic active agents such as those mentioned previously, fragrancing substances such as those described previously, surfactants, spreading agents, wetting agents, dispersants, antifoams, neutralizers, stabilizers, polymers and especially liposoluble film-forming polymers, and mixtures thereof.
• compositions according to the invention may be in any form that is acceptable and common for a composition intended to be conditioned in an aerosol device.
• a person skilled in the art can choose the appropriate composition, and also its method of preparation, on the basis of his general knowledge, taking into account first the nature of the constituents used, especially their solubility in the support, and secondly the application envisaged for the composition.
• the compositions according to the invention are fragrancing products conditioned in an aerosol device such as an eau de toilette, a perfume, an ambience perfume in which the particles comprise at least one fragrancing substance. More particularly, the compositions will also contain a fragrancing substance in free form, which may be identical to or different from the fragrancing substance present in the particles.
• compositions according to the invention may be in the form of a hair product conditioned in an aerosol device.
• hair products may especially be products intended for non-rinsed cleansing of the hair such as dry shampoos, intended for hairstyling and/or hairsetting such as hair lacquers, mousses or conditioning products; disentangling, sheen, smoothing, etc. cosmetic products for caring for and/or treating the hair and the scalp.
• the particles comprise at least one fragrancing substance.
• compositions will also contain at least one fragrancing substance in free form, which may be identical to or different from the fragrancing substance(s) present in the particles.
• the compositions according to the invention may be in the form of a hygiene product, in particular of deodorants and/or antiperspirants in which the composition comprises at least one deodorant active agent and/or at least one antiperspirant active agent, in free form and/or in encapsulated form.
• the particles comprise at least one fragrancing substance.
• the compositions will also contain at least one fragrancing substance in free form, which may be identical to or different from the fragrancing substance(s) present in the particles.
• antiperspirant active agent means a compound which, by itself, has the effect of reducing the flow of sweat and/or of reducing the sensation of moisture on the skin associated with human sweat and/or of partially or totally absorbing human sweat.
• antiperspirant active agents that may be mentioned are aluminum and/or zirconium salts such as aluminum chlorohydrate, aluminum chlorohydrex, aluminum chlorohydrex PEG, aluminum chlorohydrex PG, aluminum dichlorohydrate, aluminum dichlorohydrex PEG, aluminum dichlorohydrex PG, aluminum sesquichlorohydrate, aluminum sesquichlorohydrex PEG, aluminum sesquichlorohydrex PG, alum salts, aluminum sulfate, aluminum zirconium octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate and more particularly the aluminum chlorohydrate in activated or nonactivated form sold by the company Reheis under the name Microdry Aluminum Chlorohydrate® or by the company Guilini Chemie under the name Aloxicoll PF 40.
• aluminum and/or zirconium salts such as aluminum chlorohydrate, aluminum chlorohydrex, aluminum chlorohydrex PEG,
• Aluminum and zirconium salts are, for example, the product sold by the company Reheis under the name Reach AZP-908-SUF®, “activated” aluminum salts, for example the product sold by the company Reheis under the name Reach 103 or by the company Westwood under the name Westchlor 200.
• the cosmetic composition comprises aluminum chlorohydrate as antiperspirant active agent.
• expanded perlite particles such as those obtained by the expansion process described in patent U.S. Pat. No. 5,002,698.
• the perlites that may be used according to the invention are generally aluminosilicates of volcanic origin and have the composition:
• the perlite particles used will be ground; in this case, they are known as Expanded Milled Perlite (EMP). They preferably have a particle size defined by a median diameter D50 ranging from 0.5 to 50 ⁇ m and preferably from 0.5 to 40 ⁇ m.
• EMP Expanded Milled Perlite
• the perlite particles used have a loose bulk density at 25° C. ranging from 10 to 400 kg/m 3 (standard DIN 53468) and preferably from 10 to 300 kg/m 3 .
• the expanded perlite particles according to the invention have a water absorption capacity, measured at the wet point, ranging from 200% to 1500% and preferably from 250% to 800%.
• the wet point corresponds to the amount of water which has to be added to 100 g of particles in order to obtain a homogeneous paste.
• This method is directly derived from the oil uptake method applied to solvents. The measurements are taken in the same manner by means of the wet point and the flow point, which have, respectively, the following definitions:
• Wet point weight, expressed in grams per 100 g of product, corresponding to the production of a homogeneous paste during the addition of a solvent to a powder.
• the wet point and the flow point are measured according to the following protocol:
• the glass plate is placed on the balance and 1 g of perlite particles is weighed out.
• the beaker containing the solvent and the sampling pipette is placed on the balance.
• the solvent is gradually added to the powder, the whole being regularly blended (every 3 to 4 drops) by means of the spatula.
• deodorant active agent refers to any substance that is capable of masking, absorbing, improving and/or reducing the unpleasant odor resulting from the decomposition of human sweat by bacteria.
• the deodorant active agents may be bacteriostatic agents or bactericides that act on underarm odor microorganisms, such as 2,4,4′-trichloro-2′-hydroxydiphenyl ether (®Triclosan), 2,4-dichloro-2′-hydroxydiphenyl ether, 3′,4′,5′-trichlorosalicylanilide, 1-(3′,4′-dichlorophenyl)-3-(4′-chlorophenyl)urea (®Triclocarban) or 3,7,11-trimethyldodeca-2,5,10-trienol (®Farnesol); quaternary ammonium salts such as cetyltrimethylammonium salts, cetylpyridinium salts; polyols such as those of glycerol type, 1,3-propanediol (Zemea Propanediol® sold by DuPont Tate & Lyle Bio Products), 1,2-decaned
• deodorant active agents in accordance with the invention, mention may also be made of:
• the deodorant active agents may preferably be present in the compositions according to the invention in weight proportions of from 0.01% to 10% by weight relative to the total weight of the composition.
• the invention also relates to a cosmetic process for treating body odor and optionally human perspiration, which consists in applying to a keratin material a composition comprising particles as defined previously; said composition comprising at least one deodorant active agent and/or at least one antiperspirant active agent in free form and/or in encapsulated form.
• Capsules were prepared using the following composition:
• Potato maltodextrin MD20 P and Amidon Capsul® sodium salt of starch octenyl succinate
• Amidon Capsul® sodium salt of starch octenyl succinate
• the emulsion obtained was then homogenized at a pressure of 30 bar using a high-pressure pump and then sprayed in an atomization chamber using a nozzle simultaneously with a stream of CO 2 (30 bar, 45° C.) which was circulated continuously at a flow rate of about 500 g/min to remove the water.
• the dried powder was retained on a filter located at the base of the atomization chamber, and then collected after depressurization. 270 g of spherical microcapsules are thus obtained in the form of a fine white powder with a number-mean diameter of 7.8 ⁇ m and a volume-mean diameter of 47 ⁇ m.
• the particle size was measured via a dry route by laser scattering using a Microtrac S3500 particle size analyzer, the particle sizes being expressed by volume and by number.
• Capsules having the same composition as Example A as described above were prepared according to the process of Example 1 of patent U.S. Pat. No. 6,200,949 comprising drying by spray-drying (atomization) of the emulsion described in Example A.
• the emulsion is dried by spray-drying using a Bowen Lab Model Dryer machine using air with a flow rate of 420 m 3 /h at a temperature of 204° C. and an external temperature of 93° C. and a turbine speed of 50 000 rpm.
• Capsules having the same composition as Example A as described above were prepared according to the process of Example 1 of patent U.S. Pat. No. 5,508,259 comprising drying by spray-drying (atomization) of the emulsion described in Example A.
• the mixture was dried by spray-drying with a CCM Sulzer machine at an emulsion flow rate of 50 kg/h, air at a flow rate of 320 m 3 /h at 350° C. and 0.45 bar.
• An anhydrous antiperspirant aerosol having the following composition was prepared:
• Example C1 Ingredients (weight %) Dimethicone 23.51 Isopropyl palmitate 4.85 Dimethicone dimethiconol 8.90 Triethyl citrate 5.66 Modified bentonite 2.10 Anhydrous aluminum 28.30 hydroxychloride Perfume capsules of 26.68 Example I Total 100.00
• Example C2 Ingredients (weight %) Dimethicone 23.51 Isopropyl palmitate 4.85 Dimethicone dimethiconol 8.90 Triethyl citrate 5.66 Modified bentonite 2.10 Anhydrous aluminum 28.30 hydroxychloride Perfume capsules of 26.68 Example J Total 100.00
• Example 1 Thick homogeneous 1.153 beige-white liquid
• Example C1 Thick non-homogeneous Not beige-white paste measurable
• Example C2 Thick non-homogeneous Not beige-white paste measurable *the density is measured using a Mettler-Toledo DA-100M densimeter. A sample of the homogenized fluid is taken using a 5 ml syringe and introduced into the densimeter. The machine automatically indicates the density.
• the criteria for evaluating the sedimentation time are the following:
• the criteria for the appearance of the fluid are the following:
• the aerosol is shaken for three seconds to homogenize it. It is then sprayed for 2 seconds onto a scent strip (Granger Veyron reference: 40140 BCSI of size 4 cm ⁇ 14 cm) so as to deposit about 0.07 g of composition. After 1 minute, the olfactory intensity is evaluated (BEF) and is graded from 0 to 10. Perspiration is then stimulated by adding about 0.1 g of water (three sprays) onto the deposited composition. After waiting for 30 seconds, the olfactory intensity is evaluated (AFT). 4 hours later, it is re-evaluated again before and after spraying the same amount of water. 20 hours later, the intensity before/after spraying with water is re-evaluated again in the same manner.
• BEF olfactory intensity
• AFT olfactory intensity
• Example 1 comprising the perfume capsules according to the invention has no odor before the addition of water, in contrast with the aerosols C1 and C2 (outside the invention), which shows that the perfume capsules in aerosols C1 and C2 are not leaktight even before the addition of water.
• An anhydrous antiperspirant aerosol having the following composition was prepared:
• Example A The perfume capsules of Example A may be replaced with the capsules of Examples B to H described previously.
• Example 2 About 1.0 g of composition of Example 2 was applied onto the skin. After 1 minute, the perfume odor intensity was evaluated (APPLICATION) and graded from 0 to 10. 2, 4 and 6 hours later, the perfume odor intensity was re-evaluated again (BEF) before adding about 0.1 g of water (three sprays) to the composition applied to the skin. After waiting for 30 seconds, the perfume odor intensity was re-evaluated (AFT).
• Example 2 has a strong odor which decreases rapidly at T2h, T4h and T6h after application. It was also observed that the spraying of water onto the product at T2h, T4h and T6h leads to an increase in the odor intensity (especially of the fresh notes), which demonstrates substantial release of perfume each time.
• An anhydrous dry shampoo having the following composition was prepared:
• Example F The perfume capsules of Example F may be replaced with the capsules of Examples A to E, G and H described previously.
• An anhydrous dry shampoo having the following composition was prepared:
• Example B The perfume capsules of Example B may be replaced with the capsules of Examples A and C to H described previously.
• An anhydrous antiperspirant aerosol having the following composition was prepared:
• Example H The perfume capsules of Example H may be replaced with the capsules of Examples A to G described previously.
• a thick opaque beige-colored liquid was thus obtained, which is then introduced into a closed aerosol can.
• the air is removed from the container, which is then filled with the propellant gas (isobutane) in a 15 (fluid)/85 (gas) ratio.

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• 2014
  • 2014-07-09 FR FR1456629A patent/FR3023479B1/fr not_active Expired - Fee Related
• 2015
  • 2015-07-01 WO PCT/EP2015/065003 patent/WO2016005245A1/fr active Application Filing
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